I don't know, if someone mentioned it already, but for this release you don't need to change ANYTHING on your HD2. Simply copy the files to your SD-Card and start the two exe's. This release has no need for MAGLDR, HSPL, SSPL, downgrade to ROM 1.6...
Confirmed working on 1278_4770_17.1.A.2.55 Vodafone Firmware! Working on second attempt.