ANS to: Will I be able to Alt-tab out while running the game?
Yes, you will be able to Alt-tab out while running the game either in full screen mode or window mode.

ANS to: What makes Granado Espada different from other MMORPGs?
There are 8 unique features in Granado Espada.
1. MCC (Multi Character Control)
2. NPC Collection
3. Stance
4. Baroque Style
5. The Age
6. Family Management
7. Music Feast
8. Gorgeous Scenery
Read more on these 8 unique features

ANS to: What is IAH?
IAH stands for Infocomm Asia Holdings.
For more information on IAH, please visit IAH website : http://www.iahgames.com