Better control with InetGet

I have created a script with Autoit,
its just a simple script to retrieve some manga information from website and for viewing the pages.
Then i'm starting to create a script for downloading pages to support the above script,
but its just not working like i wanted it to.
Worked fine at the start but when downloading process is running, i can't no longer have control to the gui.

Is there any better way to do this?
Can anyone show me how to?
Sorry for my bad English

here is the script, created with v3.3.8.1:
-  MangAutoIt.au3   38.61K   8 downloads
  run this once to create files and folders needed
-  MADownloader.au3   13.73K   7 downloads
  downloader support for script above
- English.lang (not permitted to post this?)
  a language file. Just put in Lang folder to add a language

currently supported:
search for manga title & chapter from internet
easy plugin creation with just using .ini format
multi language from .lang file that also use .ini format
synchronize latest chapter with download site
Zoom & brightness
no download limit