I converted my WRT610N v2 to a E3000 by flashing the CFE
And i installed the experimental build Kernel 2.6 (experimental) for MIPSR2 Routers > E3000 Ext (for Linksys E3000 ONLY!)
It's running in client mode now, without any problems with dd-wrt i had allot problems but this firmware solved everything.
And i must say im impressed, the device is running even smoother then with the stock firmware and even better then dd-wrt.
Many thanks to the developers.