Hello,
I had the same problem but stumbled on a french website, : acer-club.fr , half way thru there are 2 downloadlinks, download them both.
Then start with the programme ruth install it, reboot system.
Then start ruth programme he will ask for a rom, now that is the second file you downloaded, select it (do not unzip it first).
Disconnect your phone from the pc, take out the battery of youre phone, re-insert it.
when the programme says looking for device.
Then press the left key (left side of the circle and simultaniusly the green phone (connect) key and insert the usb cable
then after a few seconds the phone will be flashed with a android 1.5 version with market !
worked for me!
greetz Kevin