I uploaded all the collection into a folder. The bitrates go from 128 kbps to VBR. Wish I could got them in better quality. Covers are 600 x 600 Pixels. Had to make a new one for the Gradius one. The discs are:

MIDI POWER X68000 COLLECTION ver.1.0 (http://vgmdb.net/album/86) (MPV10.rar)
MIDI POWER ver.2.0 X68000 COLLECTION (http://vgmdb.net/album/4388) (MPV20.rar)
MIDI POWER ver.3.0 X68000 COLLECTION (http://vgmdb.net/album/88) (MPV30.rar)
MIDI POWER ver.4.0 (http://vgmdb.net/album/1271) (MPV40.rar)
MIDI POWER ver.5.0 (http://vgmdb.net/album/89) (MPV50.rar)

MIDI POWER Pro Best Selection (http://vgmdb.net/album/1272) (MPP1.rar)
MIDI POWER Pro 2 ~SALAMANDER 2 TWINBEE YAHHO!~ (http://vgmdb.net/album/1273) (MPP2.rar)
MIDI POWER Pro 3 ~Policenauts~ (http://vgmdb.net/album/90) (MPP3.rar)
MIDI Power Pro 4 ~Tokimeki Memorial~ (http://vgmdb.net/album/91) (MPP4.rar)
MIDI POWER Pro 5 ~SALAMANDER~ (http://vgmdb.net/album/1274) (MPP5.rar)
MIDI Power Pro 6 ~Akumajo Dracula X Gekka no Nocturne~ (http://vgmdb.net/album/1275) (MPP6.rar)
MIDI POWER Pro 7 ~GRADIUS~ (http://vgmdb.net/album/1276) (MPP7.rar)

MIDIs are not included. The folder is located HERE (http://www.mediafire.com/?3ldhczh33u7af). Happy download!

Nice.

Thanks a lot!