If you are doing a full volume mash, then you should probably use a BIAB mash profile. If you are planning on sparging, then use a standard mash profile. For the program, it does not matter if you are using a propane burner, electric element, or a HERMS/RIMS system to heat the water and maintain the mash temperature.
In terms of grain absorption, if you are planning on squeezing the bag to reclaim more of the wort, then you should target a lower absorption value. You can start by adopting the standard absorption for BIAB which is in the program and measure your water in vs water out of your mash to determine exactly how much is retained to adjust for the next brew.