Virtual Iron目前支援的虛擬機器，也就是Guest OS種類：

* RHEL 3 U8 32-bit
* RHEL 4 U4 and U5 AS 32-bit and 64-bit
* CentOS 4 U4 and U5 32-bit and 64-bit
* RHEL 5 U0 32-bit and 64-bit
* CentOS 5 U0 32-bit and 64-bit
* SUSE Linux Enterprise Server 9 SP3 32-bit and 64-bit
* SUSE Linux Enterprise Server 10 SP1 32-bit and 64-bit
* Windows 2000 SP4 32-bit
* Windows XP SP2 Professional 32-bit
* Windows Server 2003 SP2 32-bit and 64-bit
* Windows Vista 32-bit

文章中安裝uBuntu 7.10當成範例，在安裝選項中是選擇「Other Linux」。

Windows Vista 64-bit與Windows Server 2008還不支援。