epson LX-300

Good news, there is 32-bit and 64-bit support. :)
Windows 7 Compatibility Center - Epson LX-300 Printer

Steps:
Open "Devices and Printers"
Click "Add a printer"
Select "Add a local printer"
Then "Choose a printer port"
The Epson LX 300 will not be listed until after you click "Windows Update" to find more printers.
Now you can browse and select your printer.
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It is also important to mention that if you are installing from a shared network printer and the printer will not install, install the printer as if it is directly connected first. This ensures that the drivers are installed and will then allow you to install the shared network printer.

Good luck, I hope this helps you install your printer. :)