Yes, as Ibrahim says, after purchase, they will build a personalized ISO image for you to download.
You can burn it to DVD or build a bootable USB stick or even put it on a special HD (small FAT) partition to install. You shouldn't need a USB diskette drive but booting should work.
For maintenance, which I assume you tried to boot the diskettes for, you can use the burned DVD or USB stick, there's an option to leave the installer to a maintenance desktop.
As for PCMCIA cards, they should be supported given the drivers.
The latest current version is 5.0.6 with 5.1 in the pipeline, assuming it is released in the next 6 months, you also will be able to download that. As well as any driver updates that have been done since the release of 5.0.6.
As for the actual install, here I found I had to deselect the AHCI driver for the install to finish, it is not needed, you may find the SNAP video driver better on your system.