I don't know maybe I'm not an expert but I will try to answer your questions:


1 - Yes you will, but you must put on a FAT file system so you have some limitations. maybe 2 Gigs?
2 - yes, put in on a subdirectory called VIDEO
3 - Yes you are able already with firmware 1.80+ You should use Nero, as it can detect that the mp4 dosn't need to transcode. You can also use TVersity but it will transcode your videos to MPEG2. Maybe a patch is comeing to TVersity too ....
4 - I don't know ... maybe. The MP4 derived open codecs like Matroska dosn't work ...

MrMxyzptlk said 2 gb file size limit on external drives. its actually 4gb jus thought id clear it up. dont kno much about video codecs because i jus get divx and play it directly on my divx dvd player

I use Mpeg4 converter,it convert mpeg4 video file good.

MPEG-4 is a collection of methods defining compression of audio and visual (AV) digital data. It was introduced in late 1998 and designated a standard for a group of audio and video coding formats and related technology agreed upon by the ISO/IEC Moving Picture Experts Group (MPEG) under the formal standard ISO/IEC 14496. Uses of MPEG-4 include compression of AV data for web (streaming media) and CD distribution, voice (telephone, videophone) and broadcast television applications.

MPEG-4 absorbs many of the features of MPEG-1 and MPEG-2 and other related standards, adding new features such as (extended) VRML support for 3D rendering, object-oriented composite files (including audio, video and VRML objects), support for externally-specified Digital Rights Management and various types of interactivity. AAC (Advanced Audio Codec) was standardized as an adjunct to MPEG-2 (as Part 7) before MPEG-4 was issued.

The key parts to be aware of are MPEG-4 part 2 (MPEG-4 SP/ASP, used by codecs such as DivX, Xvid, Nero Digital and 3ivx and by Quicktime 6) and MPEG-4 part 10 (MPEG-4 AVC/H.264, used by the x264 codec, by Nero Digital AVC, by Quicktime 7, and by next-gen DVD formats like HD DVD and Blu-ray Disc).

Code Red wrote:

I don't like Mpeg4 myself. I use xvid. get about same quality in smaller file.

Of course you would get the same quality, as they (DivX and XviD (XviD is just DivX backwards)) uses MPEG-4, so you DO use MPEG-4, you just were not aware of it...

Code Red wrote:

well I be damned!

so how can same compression yield smaller files?

There are LEVELS of compression; and I can tell just by looking at the picture, a percentage it was compressed.  They do have their default compression techniques, but you can go farther.    I have some TV shows that are compressed a LOT, to 356MB, and some at over 1GB.  Well, the 1GB files look spectacular, while the 356MB ones are grainy and just above MPEG1 looking.

So, it's all on how far you want to pack the file up...

NO, an ISO is an image file of a CD, DVD, Floppy, and so on, and uncompressed.  The CSO is a compressed ISO (CISO), but CSO as the extension for short.  A CSO has nine levels of compression.  I think the PSP can use both ISO and CSO files.

If you want to know what an extension is, here is a nice place to look, just change the three letter extension at the end of teh URL and see if it exists:
http://filext.com/file-extension/cso

Change CSO to whatever OTHER one you're looking up, and if it's a legit extension, they'll have it.

This software is okay. But I much prefer cheapestsoft mpeg4 converter on tucows. It has more sets.