As a Sumvision Astro owner, I would thoroughly recommend you look at Suggsy's ICS 4.0.3 with CWM, and then flash ICS 4.0.4 onto the tablet. I've tried just about every stock image/rom/doohickey I can find, and am getting by far the best results from Suggsy's ICS 4.0.4 across the board.
However, the Sumvision build is certainly better than the Tablo one, which caused me nothing but constant stability failures!
First, install Suggsy's 4.0.3 with CWM using Livesuite.
viewtopic.php?f=55&t=2155Then flash Sugsy's 4.0.4. using CWM (Version 1 - Stable release)
viewtopic.php?f=48&t=2558Far from a tech genius, I managed to get through these by piecing the information together, but if anyone wants some simple steps, I'd be happy to PM or put down here, but there are far wiser and better men than I who've already done so!