Anyway...
You could...
Add say a 300 GB HD for about $100
2 GB of memory for $60
And a recovery CD for about $20
And you would achieve your goal, but remember there is now Windows Vista and Windows 7. Both want about 2 GB min, I think. They like memory.
Mainstream support is retired as of April 2009. After 2014 it becomes nearly useless.
Microsoft Support Lifecycle
I guess there is no secret, that manufacturers lower the price by making memory the smallest necessary to run Windows. In a laptop, you have to replace rather than add.
Here's a review of that series:
Dell Latitude D610 Review (pics, specs)
Clearly, though this link:
Dell Latitude - Wikipedia, the free encyclopedia
Rules out your intended use for movies. See Del610 problems.
I would advise something with a SATA hard drive interface.
Here is the minimum requirements for Windows 7.
Windows 7 system requirements - Microsoft Windows
More uses for TPM will likely show up in the near future.
Trusted Platform Module - Wikipedia, the free encyclopedia
Windows media player and license management is a total headache as it is. You can loose your entire collection if you don't export the license once in a while and the HD crashes.
Those are just some thoughts.
I know I would be looking for SATA and ESATA and bootability from these interfaces. Recovering a laptop isn't fun.
Another reminder, is that you'll probably have to purchase a carry case.
The D610 has poor audio and video without any fixes, so it's out.
If it had these, then you'd need to add $200 for it to be decent.
Biggest advice is stay away from IDE/ATA/PATA drives. Their supply is dwindling.
For the real movie experience go visit your dentist.
http://www.venturasmile.com/glasses.asp
Or get one yourself.
http://www.i-glassesstore.com/
I'm babbleing.
Come back and see us again. Do your homework. We'll correct it.