This is something I've been working on on and off since about FM2006, it's a simple mod that changes the split view mode in matches, and should be compatiable with most if not all user made skins for FM2010 there are currently three versions of it::
Enlarged Left Side Split View Mod
This version of the mod extends the left panel in the split view so it takes up two thirds of the screen leaving one third for the right panel, in addition the contents of the left panel have been changed so they use the normal fullsized content rather than the small panels content.
Enlarged Right Side Split View Mod
This version of the mod extends the right panel in the split view so it takes up two thirds of the screen leaving one third for the left panel, in addition the contents of the right panel have been changed so they use the normal fullsized content rather than the small panels content.
Triple Split View Mod
This version of the mod adds a third panel so you now have three panels each taking up a third of the screen instead of two taking up half, each panel still displays the small panel content, however I've had to remove some screens from the middle panel - pitch view and ass. manager feedback as they don't work correctly, in addition the panel headers for the middle panel lose the team names but all the actual stats display fine.
thread in the Skinning Hideout on the Sports Interactive Forums.