I will be setting this up on mine in t-minus 30 minutes. Based on comments in the *other* thread about this, I don't think the Momentary is appropriate but I will confirm.
So for IA1 through IA5 to be scene selects, I set up as follows. Upon reading the MFC-101 manual, you can't have more than 5 in this setup.
Edit > Setup > IASw 01 Type = TOGGLE
Edit > Setup > IASw 02 Type = TOGGLE
Edit > Setup > IASw 03 Type = TOGGLE
Edit > Setup > IASw 04 Type = TOGGLE
Edit > Setup > IASw 05 Type = TOGGLE
Edit > Setup > LinkA 01 02 03 04 05
Additional setup I did before doing the two configs above:
*** NOTE: I'm listing as many relevant configs as I can here, some may be defaults, some may be able to be tweaked for additional functionality, but for completeness, I'm including what my values are ***
Edit > Setup > SendSwLinkOffMsg = YES
Edit > Setup > IASw 01 Send w/Prst = YES
Edit > Setup > IASw 02 Send w/Prst = YES
Edit > Setup > IASw 03 Send w/Prst = YES
Edit > Setup > IASw 04 Send w/Prst = YES
Edit > Setup > IASw 05 Send w/Prst = YES
Edit > Setup > IASw 01 Global = NO
Edit > Setup > IASw 02 Global = NO
Edit > Setup > IASw 03 Global = NO
Edit > Setup > IASw 04 Global = NO
Edit > Setup > IASw 05 Global = NO
Edit > Setup > IASw 01 Name = Scene 1
Edit > Setup > IASw 02 Name = Scene 2
Edit > Setup > IASw 03 Name = Scene 3
Edit > Setup > IASw 04 Name = Scene 4
Edit > Setup > IASw 05 Name = Scene 5
Besides these five scene toggles, I also set UP / DOWN to toggle between presets one at a time.
Edit > Setup > BankSize = 0
Edit > Setup > BankStyle = CURRENT
Edit > Setup > FirstPrstSwitch = OFF
Edit > Setup > PerfMode = PRESET
I can add the specific CC/PC config I did to accomplish this, but I primarily followed Rob's steps.
In summary, this config allows me to flip through presets with UP/DOWN, and select one of five scenes in any preset. In my case, Scene 5 is always Mute/Tuner so I changed my Edit > Setup > IASw 05 Name from "Scene 5" to "Tuner", and it switches to the muted scene with c1, and c2 calls up the tuner.
I only use three presets for my live gigs so it works great for me. If you have more presets and toggle between them frequently, you could set those to IA 06 - 10, and set:
Edit > Setup > LinkB 06 07 08 09 10
Edit > Setup > BankSize = 5
Then 1-5 would be scenes, 6-10 would be presets. UP / DOWN would increment the IA6-10 switches by 5 presets at a time.
I plan on setting up my 6-10 for specific block channel toggles (Amp1 Channel A to B, etc.) and block bypasses. (Drive, Comp, etc.) If people need instructions on this, I'm happy to provide details on that too.