ASA forward range of ports

[qwas6615]

Hi,
Anyone knows how to forward range of ports to internal IP ?

I need to forward UDP ports 10000 to 20000 for RTP voice transmission.
I don't want to type in static command 10000 times

static (inside,outside) udp interface 10000 192.168.25.100 10000 netmask 255.255.255.255

I have only 1 external IP from my ISP so I can't do PAT - my only option is NAT.
SIP fixup seems to be only partially working... To connect IP Phone from Internet I must have this port range forwarded.

Thanks in advance