Are you using SDM? SDM only supports IE6.
If you use CCP, you can use IE7 as per the release notes:
http://www.cisco.com/en/US/docs/net_mgmt/cisco_configuration_professional/v1_4/rlsnts/ccp_rel_notes.html
Regarding BW distribution, it is possible. I believe on the 837, there are 4 switchports and 1 ethernet port.
In that case you can assign the switchports to vlans and use class-maps, service policy and use the keyword bandwidth to configure the bandwidth you want to allocate.
http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/12_4/qos_12_4_book.html
Example:
interface FastEthernet3
description ETC
switchport access vlan 3
no cdp enable
service-policy output ect_policy
policy-map ect_policy
class ect_class_voice
bandwidth 64
class class-default
bandwidth 128
class-map match-all ect_class_voice
match protocol h323