I've made a remote script for the Akai MPD-32, that gives you APC-like control over session view. A lot of the code is copy/pasted from stuff I found on http://remotescripts.blogspot.com/ (thank you Hanz Petrov!) and from existing remote scripts. If you want a (less advanced) remote script for your MPD-26 or MPD-24, then go here: http://forum.ableton.com/viewtopic.php?f=4&t=157266
If you want to use this script:
1. Set up your MPD mapping
Check the EDIT MODE section in the MPD-32 manual to change the mapping of your MPD. Make sure all controls are set up as in the picture. Use MIDI channel 1 for all controls.

2. Download and install the script
- Download http://dl.dropbox.com/u/15006701/my_MPD32.zip
- Close Live and put the my_MPD32 folder into
\Program Files\Ableton\Live 8.x.x\Resources\MIDI Remote Scripts (PC)
OR
\Live x.x.x\Live.app\Contents\App-Resources\MIDI Remote Scripts (MAC)
- Open Live and go to Preferences -> MIDI/Sync. Select my_MPD32 as a control surface and make sure the input and output are corresponding to your MPD-32.
3. Go ahead and play
- The script only uses control bank and pad bank A. You can assign the controls in the other banks to whatever you like.
- If shift (S8) is not pressed:
S1-S2: select left/right track
S3-S4: select left/right device
S5: clip/track
S6: detail
S7: on/off
- If shift (S8) is pressed:
S1-S4: move red box up/left/right/down
- Faders F1-F4 are mapped to the Sends A in the red box, F5-F8 to Sends B. K1 to K8 control the device parameters of the selected track. When using this script, I set all tracks to "sends only". I use Return A as a kind of a master bus. In my opinion, this has some advantages (e.g. avoiding the "problem" that the volume faders go up to +6dB).
- << and >> are used to go up and down the scenes, STOP is stop al clips, PLAY is launch selected scene and REC is overdub
Comments and questions are very welcome. I would really want to change the script to your needs, but unfortunately, I don't have the time to deal with individual requests. If a lot of people are asking for the same feature, I will see if I can implement it. You are free though to (re)use the code in any way you like. If you read and understand everything on http://remotescripts.blogspot.com/, then you will be able to make a script far better than this one.
Cheers,
Seppe