I tried asking in the RunDroid thread, but as I am considered a noob I am not allowed to post there...
I've been trying to install RunDroid 2.3.1, but when selecting my Storage Card root (called Speicherkarte in german) in the directory treee, RunDroid says it cannot find a valid android installation. The root of the storage card is where haret.exe, zimage and so on are located, so this is definitely the right place. I am running FRX07 on Topaz.
Any ideas? Thanks.