1/ you can import your addresses using my build, I just tried that again with 0.49 and it works, but:
- the wallet must be unencrypted at the time of import
- you won't see any feedback on the command prompt. but when you open the GUI, the imported address will be there.
2/ indeed my build doesn't support text (console) mode yet.
full command-line support is on my to-do list and will be hopefully ready soon.
How can i import an address from the GUI (without the command line)? How can i display the private keys without the command parameters (console)?
I think the last btcurious version i used was 0.40
I hope you will soon succeed with the full command-line support. It would be a big gain.
I look forward to make a donation to your addr.

Thanks for planning to donate, that's a real motivator to
help me prioritize my to-do list

In the meantime, here's how you would import a key with the
current build (0.49b):
0. Make sure you're online. This build won't work in offline mode.
1. Open a standard command prompt (Start Menu, Run, type cmd, click OK)
2. Drag the Elec049b.exe icon to the command prompt window. This will insert the full path to the executable.
3. add a space, type "import YourAddress:YourPrivKey" and hit Enter.
( So, if your Elec049b.exe file is on your desktop, your command will look something like this: C:\Documents and Settings\bitcats\Desktop\elec049b.exe import YourAddress:YourPrivKey )
4. That's it! Open the Electrum GUI by clicking the EXE file normally,
and you should be able to see and use your imported address.
(5. Repeat as needed, for each address you would like to import)
Regarding your second request (how to display your private keys), this
will be possible when full command-line support is ready.