You won't be able to get RSLogix 500 in a big hurry if you're a day away from your distributor, so you should be focussing on using APS with your SLC.
What you really need is a DOS computer !
When I need to get DOS running on my Windows 2000 PC, I don't usually do anything fancy with partitioning or emulation; I use a bootdisk.
Usually it's been a year or more since I've done this so I've lost my DOS 6.22 bootdisk and I end up downloading an image from "www.bootdisk.com".
When I boot up using one of these, I can usually see both my A: drive and the C: drive, and it's easy to navigate to the C:\IPDS\SLC500 directory and start the APS software.
It's good that you're using an SLC-500 controller that can be easily connected via a simple RS-232 null modem cable to Channel 0. Try 1200 baud first, then 19200 as your data rates (the old and new defaults for SLC's), and be sure to use CRC error checking.