Sure you can. I use bbclean with a memory limiting plugin. Hovers around 5mb RAM usage when idle.
Be sure explorer isn't running anymore along with the replacement one though as this will accomplish nothing except using more resources. I can't speak for others but bbclean and bblean require you to use the 'install' option from it's menu. Otherwise it'll run on top of explorer and may not work as expected.
Some more- http://en.wikipedia.org/wiki/Windows_shell_replacement
If you replace it you can still use explorer for file manager functions as normal. explorer.exe will start and close for that.
Patching your maximum amount of half-open connections may help your speeds. (XP)
TCPIP.SYS patcher (XP)
If you use ?Torrent be sure to set protocol encryption to Enabled in the preferences. Only use Forced if you seem to be getting throttled.
And forward the port you set in the preferences. Very important.
I know this is a long shot, but has anyone managed to fleece Sanyo of the meanings of their service codes that are in the service menu of many of their tv's? The individual options go up and down in systematic order and seem to be in hex. I didn't dare change any of them though. Top line displays Ver 062. The rest is numbers and hex letters. They protect these codes as if they were launch codes.
Go to Control Panel->System->Hardware->Device Manager. Double click your network adapter. There should be an Advanced tab. Ensure no things such as minimum power consumption or power save mode is enabled. Set Rate to best. Roaming decision to optimize distance. Yours may be termed differently or not exist.
x1 will produce the best, best meaning least chance of a coaster. Should you burn at this speed? No not unless your drive is crappy or you are using crappy media.
You can get them anywhere. You buy them at a store for about how much they come with on them. They're by credit card companies and you fill out the billing info just like you would for a normal card. Just select for example 'Visa' then enter the number and exp. date. Many of them are reloadable but I never bother. It kind of defeats the purpose.
I'm not familiar with that program, but as long as it doesn't do something radical it shouldn't mess anything up. Unless your hard drive is failing and is out of spare sectors or if the program causes CRC errors.
I handle things like HD mkv's, DVD images as well as huge 237GB truecrypt files. so for me it's NTFS. NTFS even if I didn't. Even though my co-booting linuxs' support for it sucks.