Ok, let me get this straight. You want an AOSP-like ROM, but don't want to go full AOSP because you want to keep 4g. You don't like the AOSP browser, though, and want to keep the HTC one. Is that correct?
If so, how did you go about getting the the HTC browser installed? I see from the Vaelpak thread on xda that it comes with the AOSP browser by default, and the HTC one is available in /sdcard/vaelpak-extras/Replaced. Is that what you installed and is now crashing?
Another AOSP-like sense rom is EVO-NonSense. You can find it on xda. It, too, has the AOSP browser, though, and I'm not sure if the HTC browser is readily available for it on the sdcard like it is with vaelpak.
Or, like wase4711 suggested, just use a different browser.