mahanpaapi

yes, this is correct.
 
this is not ਅੰਤ, it appears to be and makes sense as ਔਣ (means coming, here it means inhale)
 
it appears to be and makes sense as  ਹੋਰ (also).
 
it appears to be and makes sense as ਸ਼ੁਭ-ਚਿੰਤਕ (means well-wisher).
 
These are Maharaaj Ji holy signature, last part most likely it is scribbled as Singh.

Letter 2:
Dear Darshan Singh Ji.
Guru Bless you, received your letter.
If you cannot do dhyaan with closed eyes then place photo (Satguru Maharaaj Ji's) in front of you and then do bhajan (simran) while focussing on it. Slowly slowly (your) inner being will stabilize. with hard ward (you can) succeed in every task. 
sincerely,
Isher Singh Rarewale.
 

yes, this is correct.
 
this is not ਅੰਤ, it appears to be and makes sense as ਔਣ (means coming, here it means inhale)
 
it appears to be and makes sense as  ਹੋਰ (also).
 
it appears to be and makes sense as ਸ਼ੁਭ-ਚਿੰਤਕ (means well-wisher).
 
These are Maharaaj Ji holy signature, last part most likely it is scribbled as Singh.

I just did simple and literal translation, hope that works otherwise let me know, can try to type in Punjabi.

Letter 2:
Dear Darshan Singh Ji.
Guru Bless you, received your letter.
If you cannot do dhyaan with closed eyes then place photo (Satguru Maharaaj Ji's) in front of you and then do bhajan (simran) while focussing on it. Slowly slowly (your) inner being will stabilize. with hard ward (you can) succeed in every task. 
sincerely,
Isher Singh Rarewale.
 

Letter 1:
Dear Respectable,
With Guru's Blessing,
Received your letter. After reading got to know your condition. Regarding Ik Onkar's Satnaam simran, when breath out say Ik Onkar and when
breath in say Satnaam. You do this in morning after Japuji Sahib and without maala; and in the evening do Waheguru simran, Wah when breath
out and Guru when breath in, do as much as you can. there is need to save every breath. 
Wahegure Bless you.
sincerely, 
Isher ...
 
 

Sant Isher Singh Ji Maharaaj Karamsar Rarasahib Ji's handwritten letters on Naam Simaran, with particular reference to focusing on Sri Guru Maharaaj Ji's Saroop 

Baba Nand Singh Ji Nanaksar Kaleran, Baba Attar Singh Ji Gursagar Manstuana, and Sant Isher Singh Ji Karamsar Rarasahib, all Mahapurakhs always advise devotees to focus on Satguru Maharaj Ji's Saroop, preferably His Lotus Feet, for a variety of functional and spiritual reasons; no, I don't have any sources off hand but if I come across I will post it. Further, it is recommended for everyone, but will go a long way if it is direct Bachan by a Sadhu for a particular devotee. If one truly (which is hard as one tend do things based on his or her budhi) believes in a Mahapurakh's Bachan and start to follow, He still find a way to help the devotee. 

Sant Isher Singh Ji Maharaaj Karamsar Rarasahib Ji's handwritten letters on Naam Simaran, with particular reference to focusing on Sri Guru Maharaaj Ji's Saroop 

Sant Isher Singh Ji Maharaaj Karamsar Rarasahib Ji's handwritten letters on Naam Simaran, with particular reference to focusing on Sri Guru Maharaaj Ji's Saroop 

most sampardya's suggest focusing on Sri Guru Nanak Dev Ji Maharaj Ji's Saroop, preferably on His Lotus Feet.

now, after virulent and hatefully attacking Baba Nand Singh Ji Maharaj, you have crossed the line from which I guess there is no return according to Sri Sukhmani Sahib, and you may want to recite it, over and out! 

now, after virulent and hatefully attacking Baba Nand Singh Ji Maharaj, you have crossed the line from which I guess there is no return according to Sri Sukhmani Sahib, and you may want to recite it, over and out! 

I forgot to add mahavak link in my post above:
 
 

I would say both equally important for eg-Gurbani-  Japji sahib(pauri of sunana, manan, nidhashan)-  have sunan(deep listening), manan(acknowledging/following)  and nidhashan (deep contemplation) of mahavaks- supreme statements in gurbani, mahavaks are everywhere in gurbani in form of gurmantar, mool mantar, gurbani, including sukhmani sahib and naam simran is deep contemplation/awareness of vahiguru paratama/atma-presence 
Gurbani  (Sunana/Manan/Nidashan) of mahavaks works as enforcement for spiritual aspirants to do Naam simran in every day until one reaches effortless/ unbroken spontaneous naam liv-unbroken current of Vahiguru/Paratma/ atma/self- self/god realization.