I have the same sort of problem. Rooted with recovery and installed a new ROM but then in reboot i get the splash page but then just a black screen. Tried a couple of ROM's but all the same result?
Just really want to get my CUS2 Donut version up to eclair....
Ok, so i finally understand what went wrong. The acer support section wasn't that clear for me. Now just grabbed the 2.1 CUS2 bin from the liquid e section and that solved the problem! Now running eclair with Malez Recovery and ready for some custom ROM's
So i also found out that i can forget the CUS2 bin story. That's only when using official acer updates. With the ACER Download Tool [Single] i've now managed to install the leaked alpha version of froyo!