Type /leech to leech the web for proxies, Do not worry if mIRC freezes or hangs, this means the script is working to import proxies into temporary files which will be scanned onward.
Do not forget you can open the menu of the scanners windows by right-clicking on them.
To scan custom proxies you can 1. ) Save your proxies into files (.txt) and click scan multiple files. OR Copy some proxies with (CTRL +C) paste them into the edit box (CTRL + V) .
Remember: You can always open the scanners window by typing: /scan.win or by accessing it from the menu.