Don't rush him or beg for a beta. He will release a beta version when it is ready and or if he wants to. Just be patient.
Something I've been working on for a while, its part of the big surprise I *cough* VIP *cough*............................................... .................................................................................. \/
I'm really liking the work so far. I too would like to see a Liberty Walk SBR4. If you need rims, you could try these out: http://slg.serv1.free.fr/forza3_wheels.html They are Z-modeler rims; so I'm not sure if they can be converter to whatever you are using.
Thanks but I have no idea on how to import zmodeler. First time I've heard of it actually, is it free? I try to make my own, if I knew how I could've saved time using the lowenharts, but as previously stated I'd rather make my own