Current pdf standards on 68k?

[fishy_fiz]

I have, as Im sure do many of you, a decent collection of amiga manuals, magazines, etc. in .pdf format. Now I actually quite like pdfs, having the original source "structure" in tact, and the ability to zoom in and so on I find handy. The problem is however trying to use them on a 68k amiga.
APDF I do like, but it only supports older style pdfs which renders it pretty unusable for a large percentage of the scans out there.

Now can anyone tell me please, if there's any software out there to convert pdfs to an older pdf standard? (sorry, I dont really know the internals of pdf files enough to be overly concise here, I just know that APF uses the 1.3 standard, whereas 1.5 is pretty much essential these days).
Failing that can anyone tell me please if there's any offline alternatives to read more modern pdfs on AmigaOS (68k/os3.x)?

Also, I can anyone tell me if Amigaguide files can contain images please? Id be interested in converting a few of my more regularly used documents into a format I can use on my a1200 (pdfs are nice, but a bit heavy for my a1200).

Thanks in advance.

[fishy_fiz]

@klapdeur & Gulliver

Thanks, between the 2 of you it's covered everything I was hoping for  

[fishy_fiz]

Ah, cool, thanks Nicolas. I tried a quick recompile, and so far it looks like it shouldnt be too hard. Only problem I had so far was a missing lib, but sources for it are included in the archive. Should be easier than AROSPDF at least.

[fishy_fiz]

I finally got around to setting up ghostscript and its gui. Works nicely, but there's a weird "bug". Opening a page of a pdf file if the machine is left alone is quite slow. You can see the page as its drawn from top to bottom. Entire page takes about 5 seconds.
At 1st I just assumed it was very slow, but after experimenting a little I realised rendering can be instant and the visible redraw only happens if the machine is left alone. Simply activating another window (or even the desktop) will make the page then render instantly.

Anyone have any clues as to whats going on here please? Any solution would be appreciated.

Thanks.