Durood

Reciting words of durood not established in the Hadith

Q: There is a specific durood from the elders that I have found repeatedly. Yaa rabi salli wa sallim daa e man a ba dan a laa habeebika khairil khalqi kuli hi me 

Another adds the additional line of wa barik wa salim tas leeman ka theeran ka theeraa. 

It seems as is there is an emphasis of great virtue of this specific durood. Are there any virtues or specific benefits or importance of this durood?

Reciting one hundred Durood after Fajr and Maghrib

Q: In the hadith below, do we have to recite this particular durood or can any durood be read.

Reciting One Hundred Durood after Fajr and Maghrib

Hazrat Jaabir رَضِيَ اللَّهُ عَنْهُ reports that Hazrat Rasulullah صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ said, "The one who recites one hundred Durood upon me immediately after performing the Fajr Salaah, before speaking, Allah تبَارَكَ وَتَعَالَى will fulfill one hundred of his needs. Allah تَبَارَكَ وَتَعَالَى will hasten the fulfillment of thirty needs (in this world), and Allah تَبَارَكَ وَتَعَالَى will keep the fulfillment of seventy in store for the Hereafter, and similar will be the case if one recites the Durood after the Maghrib Salaah (i.e. one will receive the same virtue)." The Sahaabah رَضِيَ اللَّهُ عَنْهُم enquired, "How should we recite Durood upon you, O Rasul of Allah صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ?" Rasulullah صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ instructed the Sahaabah رَضِيَ اللَّهُ عَنْهُم to recite the following Durood one hundred times:

إِنَّ اللَّهَ وَمَلئِكَتَهُ يُصَلُّوْنَ عَلَى النَّبِيِّ يَأَيُّهَا الَّذِينَ آمَنُوا صَلُّوْا عَلَيْهِ وَسَلِّمُوا تَسْلِيمًا اللَّهُمَّ صَلِّ عَلَى مُحَمَّد

Secondly, when reciting this durood, do we read the ayat as well or only اللَّهُمَّ صَلِّ عَلَى مُحَمَّد