How to increase shared VRAM when there is no option in bios?

[Chazar]

Hello.
I've got problem with increasing start amount of shared video memory.
I've got Gateway M275 notebook with phoenix bios v. 48.04.01. Now there is only 8MB of ram set for video at start and maximum set on 64.
I would like to have 64MB set as minimum and maximum,but my bios don't allow me to set start amount of VRAM. I need it because there are many of games which need 64 MB of video ram and don't want to run because it detects for example only 12MB of it. Other games run but warns that I don't have 64 MB of ram what is not true.
Also Intel Dynamic Video Memory algorithm is not working properly.
For example when I start Age of Empire III it tells me that I need 64MB VRAM and it deteced only 12 and asks if proceed. Then during gaming I'm loging maximum amount of shared VRAM and it's only 24MB. So when there are moments where there is more textures, game slows down a lot instead of forcing system to use all 64MB as VRAM.
I've got 1280 MB of RAM so I can easily affort to have minimum of VRAM set on 64MB. Can anyone halp me? Thanls in advance.