Acer Aspire 9410 upgrade

Processor upgrade - you more than likely cannot go to core solo or duo; BIOS support for posting the CPU and the chipset support for the CPU. I'll defer to better opinios than mine.

Video memory - Yes, the 950 is using some of your installed memory. You'll see that opening the task list or going to properties of my computer (the first tab, General, will show available memory)

Bluetooth adapter - you can always add a USB dongle or PCMCIA card for that functionality, but I have not seen any bluetooth internal cards for your laptop. It may never have been an option on that unit.

2GB ram - Yes, your unit can go up to 4GB, 533Mhz or 667Mhz DDR2. Trying going to www.crucial.com and selecting your model from their lists. This will give you an idea of the specs and price; around $87.99 + s&h for 2GB. 2GB is the nest price/performance point right now. 4GB would cost 369 and you would see no day to day benefit from it. 1GB would work, that is you could add 1 512MB module for around $24 s&h, but depending on your usage (desktop publishing, graphics & drawing,... ), you may exceed that quickly. For XP, you have a little more wiggle room in 1GB. If you have Vista, go 2GB. The cost is not much more and performance in the long run will be better.

Acer upgrade

Yes, it is possible to upgrade the cpu.
I upgraded to a Intel T5300 Duo core 2.
You should just pay attention to the maximum frequency of your current processor and check an equivalent one using Intel's website.

If CPU can be upgraded you want to look at socket "M" CPU's.

Can you share what exactly was the original CPU in your Acer Aspire 9410? Is it the same as euricojunior's, i.e. "Intel Core Solo T1350 1.86 GHz"? I have a Core Duo T2450 in my Acer Aspire 9410-4933 and would like to upgrade to Core 2 Duo, if possible, so I can run 64-bit OSes. TIA.