I've already found instructions of how to open up and swap out the video board on the Acer laptop, so I know it is possible.
I just need to know what I can use.
But thanks for your advice, even if it's not completely accurate.
Well, that raises some questions for me:
1) The HD 4200 is integrated into the motherboard. you sure it was the correct laptop? If it's an integrated card it should be part of the mobo and thus there is nothing to remove.
2) If it is the correct laptop, what GPU did they swap for? That should give you an idea of what can go in.
Otherwise, your greatest difficulty is figuring out what slot the laptop uses. Many companies use proprietary slots and you can only buy cards from them, otherwise the card won't fit. Others use one of a couple Mobile Xpress Module variants. Acer at one point used MXM slots, but I can't identify if your laptop does. Take a look at the MXM Upgrade site and see if you can identify what it is. They don't have your model of laptop listed as upgradeable, but you may be able to compare what you have to the data that they have: http://www.mxm-upgrade.com/index.html